It’s been implied (in other threads? Shit I suck at sourcing) that the flu-like and cold-like things we experience are not in fact the common ones of pre-cataclysm days, though it would seem that flu shots still have some effect in mitigating their likelihood through boosting your immune system (via very generic health attribute).
Tetanus was not included in that new disease variant category, but pointing out a lack of tetanus vaccines is a damn good point to be made. As is the ambiguity of injuries. The only time they exist as static objects is when they ARE infected. My proposed changes wouldn’t make wounds any less ambiguous, but it might make different damage sources a little more unique. A little.
Frankly, the whole concept needs smoothing over. I like your thoughts on it.